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  • 1
    Electronic Resource
    Electronic Resource
    Relative degree of cure in unsaturated polyester-styrene copolymer as determined by differential thermal analysis (1962)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 6 (1962), S. S19 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1962.070062218
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  • 2
    Electronic Resource
    Electronic Resource
    Purine, VIII. Über die Umsetzungen heterocyclischer o-Diamino-Verbindungen mit Acetylbrenztraubensäureester (1969)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 102 (1969), S. 4032-4042 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Kondensation von 2.5-Diamino-4-methylamino-6-oxo-1.6-dihydro-pyrimidin (4) mit Acetylbrenztraubensäureester liefert bei pH 1 überraschenderweise 82% 8.9-Dimethylguanin (16) und 15% 6.8-Dimethyl-isoxanthopterin (11), während bei pH 5 erwartungsgemäß 8-Methyl-6-acetonyl-isoxanthopterin (10) resultiert. Nach Isotopenversuchen mit 4-14C-markiertem Acetylbrenztraubensäureester findet sich dieses Atom in der 8-Position des Purin Derivates wieder. Analoge Umsetzungen mit einer Reihe von 4(5)-Amino-5(4)-alkyl(aryl)-amino-pyrimidinen (5-9) bzw. entsprechend substituierten o-Diamino-pyridinen (25,26) und mit N-Methyl-o-phenylendiamin werden beschrieben. pKa-Werte und UV-Spektren der synthetisierten Produkte wurden bestimmt.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19691021210
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  • 3
    Electronic Resource
    Electronic Resource
    Pteridine, LIX. Synthese von 7-Amino-, 7-Hydroxy- und 7-Methoxylumazin-5-oxiden und eine neue Pteridin → Purin-Umwandlung (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 3203-3215 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Pteridines, LIX. Synthesis of 7-Amino-, 7-Hydroxy- and 7-Methoxylumazine 5-Oxides and a new Pteridine → Purine Transformation7-Hydroxy- (5,7) and 7-methoxy-6-methyllumazines (6,8) can be converted to the corresponding 5-oxides 12-15 by H2O2 oxidation. Refluxing in acetic anhydride lead to deoxygenation of the 7-methoxylumazine 5-oxides (13,15) whereas the corresponding 7-hydroxy derivatives (12, 14) react under ring contraction to 1,3-disubstituted uric acids (25, 26). A possible reaction mechanism of this pteridine → purine transformation will be discussed on the basis of isotope experiments.
    Notes: 7-Hydroxy- (5, 7) und 7-Methoxy-6-methyllumazine (6, 8) lassen sich durch Oxidation mit H2O2 in die entsprechenden 5-Oxide 12-15 überführen. Beim Kochen mit Acetanhydrid werden die 7-Methoxylumazin-5-oxide (13, 15) zu den Ausgangsverbindungen desoxygeniert, während die entsprechenden 7-Hydroxy-Derivate (12, 14) unter Ringverengung 1,3-disubstituierte Harnsäuren (25,26) liefern. Ein möglicher Reaktionsmechanismus dieser Pteridin → Purin-Umwandlung wird auf der Basis von Isotopenexperimenten diskutiert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731061010
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  • 4
    Electronic Resource
    Electronic Resource
    Pteridine, XLVII Struktur von Xanthopterin-peroxid und seine Umwandlung in Melanurensäure (1971)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 3069-3072 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Pteridines, XLVII The Structure of Xanthopterin-peroxide and its Transformation into Melanuric AcidThe structure of „xanthopterin-peroxids“ (2) is discussed and a mechanism for its transformation to melanurenic acid (4) by hydrogen peroxide is proposed on the basis of 14C-experiments.
    Notes: Die Struktur des „Xanthopterin-peroxide“ (2) wird diskutiert und für seine Umwandlung in Melanurensäure (4) mittels H2O2 auf der Basis von 14C-Experimenten ein Mechanismus vorgeschlagen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19711041010
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  • 5
    Electronic Resource
    Electronic Resource
    Glycoproteins in human parotid saliva assessed by lectin probes after resolution by sodium dodecyl sulphate-polyacrylamide gel electrophoresis (1996)
    Weinheim : Wiley-Blackwell
    Electrophoresis 17 (1996), S. 91-97 
    Details
    ISSN: 0173-0835
    Keywords: Human saliva ; Glycoproteins ; Lectins ; Sodium dodecyl sulphate-polyacrylamide gel electrophoresis ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Human parotid salivary glycoproteins separated by gradient sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) and electroblotted onto nitrocellulose have been investigated using a battery of biotinylated lectin probes of characterized sugar specificity. Lectin binding, detected on blots using avidin-biotin complex (ABC) and a chemiluminescence generating substrate, was recorded on photographic film and compared with the original fluorescein isothiocyanate (FITC) stained blots or with Coomassie Brilliant Blue R-250-stained gels run in parallel. A number of glycoprotein bands which were undetected by protein stains or the periodic acid Schiff reaction were revealed by lectins. Binding by lectins from Concanavalia ensiformis, Lens culinaris, Limax flavus, Phaseolus vulgaris, Ricinus communis, Triticum vulgaris, Lotus tetragonobulus and Ulex europaeus indicated that sialylated and fucosylated triantennary and bisected, N-linked complex sugar chains were present on many glycoproteins in addition to the major glycosylated proline-rich glycoprotein (GI). Binding with lectins from Arachis hypogaea and Dolichos biflorus indicated that the O-linked sugar chains were confined to the α-heavy chain of Ig A. Comparison of lectin binding in samples from five healthy individuals revealed differences in a number of flycoproteins in addition to the previously characterized GI and CON 1/CON 2 polymorphisms and demonstrated that the H blood group antigen was expressed mainly on GI in parotid saliva. This study will be used as a basis upon which to study salivary glycoproteins in diseases affecting parotid glands.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elps.1150170116
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  • 6
    Electronic Resource
    Electronic Resource
    Mechanical properties of certain oriented crystalline polymers (1974)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 14 (1974), S. 678-681 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The yield stress is a simple function of the deformation ratio in the direction of testing for specimens oriented by uniaxial or biaxial stretching or rolling. Unless the yield stress increases more rapidly than in proportion to the deformation ratio, there will be instability during tensile creep under high loads. The relative merit of various polymers differs for creep and stress relaxation. Fatigue and bend recovery are also related to the molecular structure.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760141003
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  • 7
    Electronic Resource
    Electronic Resource
    Non-Isothermal crystallization of isotactic polypropylene in dotriacontane. I: Effects of dilution, cooling rate, and nucleating agent addition on overall crystallization kinetics (1993)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 33 (1993), S. 529-536 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The overall non-isothermal crystallization kinetics for nucleated and non-nucleated isotactic polypropylene (iPP) in dotriacontane systems was investigated. Adipic acid was used as the nucleating agent. Crystallization peak temperature was determined via differential scanning calorimetry as a function of the experimentally controlled variables iPP concentration, cooling rate, and nucleating agent concentration. The influence of these variables on crystallization mechanism and spherulitic structure as implied by the Ozawa and Ziabicki analyses was determined. The non-isothermal crystallization kinetics presented here are the first for iPP-diluent systems with and without nucleating agent.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760330904
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  • 8
    Electronic Resource
    Electronic Resource
    Non-Isothermal crystallization of isotactic polypropylene in dotriacontane. II: Effects of dilution, cooling rate, and nucleating agent addition on growth rate (1993)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 33 (1993), S. 537-542 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Non-isothermal crystallization growth rates of nucleated and non-nucleated isotactic polypropylene (iPP) in dotriacontane were determined experimentally by thermal optical microscopy. Adipic acid was used as the nucleating agent. The non-isothermal growth rates of the nucleated and non-nucleated systems were compared with experimentally determined isothermal growth rates. The Lauritzen and Hoffman growth rate equation, originally developed for isothermal crystallization, was modified to describe the non-isothermal growth. The modified Lauritzen-Hoffman equation was used to predict isothermal growth rates from non-isothermal crystallization for the nucleated and non-nucleated polymer-diluent mixtures. This study is the first to deal with polymer-diluent-nucleating agent systems vital to membrane production.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760330905
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  • 9
    Electronic Resource
    Electronic Resource
    Isothermal crystallization of isotactic polypropylene in dotriacontane. I: Effect of nucleating agent addition on overall crystallization kinetics (1993)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 33 (1993), S. 513-521 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The overall isothermal crystallization kinetics for nucleated and non-nucleated isotactic polypropylene (iPP)-dotriacontane systems was investigated. Adipic acid was used as the nucleating agent. Half-time was determined via differential scanning calorimetry as a function of the experimentally controlled variables dilution, crystallization temperature, and the addition of nucleating agent. The influence of these variables on crystallization mechanism and spherulitic structure, as implied by the Avrami analysis, was determined. The influence of these variables on fold surface energy was examined by the Lauritzen and Hoffman analysis.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760330902
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  • 10
    Electronic Resource
    Electronic Resource
    Isothermal crystallization of isotactic polypropylene in dotriacontane. II: Effect of nucleating agent addition on growth rate (1993)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 33 (1993), S. 522-528 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Isothermal crystallization growth rates of nucleated and non-nucleated isotactic polypropylene (iPP) in dotriacontane were determined experimentally by thermal optical microscopy. Adipic acid was used as the nucleating agent. The Lauritzen and Hoffman analysis was used to determine the fold surface energy of the nucleated and non-nucleated mixtures.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760330903
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